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From "Jitendra Nath Pandey (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-2246) Shortcut a local client reads to a Datanodes files directly
Date Fri, 04 Nov 2011 21:17:53 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2246?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Jitendra Nath Pandey updated HDFS-2246:

    Release Note: 
# dfs.block.local-path-access.user is the key in datanode configuration to specify the user
allowed to do short circuit read.
# dfs.client.read.shortcircuit is the key to enable short circuit read at the client side
# dfs.client.read.shortcircuit.checksum is the key to bypass checksum check at the client

By default none of the above are enabled and short circuit read will not kick in.
> Shortcut a local client reads to a Datanodes files directly
> -----------------------------------------------------------
>                 Key: HDFS-2246
>                 URL: https://issues.apache.org/jira/browse/HDFS-2246
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Sanjay Radia
>         Attachments: 0001-HDFS-347.-Local-reads.patch, HDFS-2246-branch-0.20-security-205.patch,
HDFS-2246-branch-0.20-security.patch, HDFS-2246.20s.1.patch, HDFS-2246.20s.2.txt, HDFS-2246.20s.3.txt,
HDFS-2246.20s.4.txt, HDFS-2246.20s.patch, localReadShortcut20-security.2patch

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